{
  "manageEntity": {
    "action": "Save",
    "entityId": "427030765",
    "entityType": "Track",
    "nonce": "0x7e3341ecc3cafa5049b4546d40a14262d26158f64bca5673161e8881c5001560",
    "signature": "0x81eae022cdec8354cad78dfb08e8f29497d664e7c625a7a07c7f2808f57fc89301da60a874dad8d4b38a9ed49989fc6d1308996bd2b58d1ab6ca292c69b5d3b91c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}